Question 892712
<pre>
{{{(x^(-2)y^(-3))^(-1)/(x^(-2)+y^(-3))}}}


On the top, multiply the two inner exponents times the one outer exponent to
remove the parentheses on top:

{{{(x^2y^3)/(x^(-2)+y^(-3))}}}

Rewrite each of the exponentials with negative exponents
as 1 over the exponential with the positive exponent:

{{{(x^2y^3)/(1/x^2+1/y^3)}}}

Multiply top and bottom by {{{red(x^2y^3)}}}

{{{red(x^2y^3)(x^2y^3)/(red(x^2y^3)(1/x^2+1/y^3))}}}

Add exponents on top, distribute on bottom:

{{{(x^4y^6)/(y^3+x^2)}}} 

Edwin</pre>